Redox luminescence switch based on Mn2+-doped NaYF4:Yb,Er upconversion nanorods
Redox luminescence switch based on Mn2+-doped NaYF4:Yb,Er upconversion nanorods
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基于Mn2+掺杂NaYF4:Yb,Er上转换纳米棒的氧化还原发光开关
作者：
Zhang Liping;Zhang Jianguo;Chen Hongqi;Wang Lun
基于氧化还原反应，研制了一种可用于谷胱甘肽（GSH）、半胱氨酸（Cys）和抗坏血酸（AA）检测的氧化还原发光开关。合成了Mn2+掺杂的NaYF4：Yb，Er上转换纳米棒（UCNRs），其发射峰位于红色区域。由于KMnO 4能将Mn 2+氧化为MnO 2，使UCNRs的发光强度发生猝灭。随后，在MnO2修饰的上转换纳米体系中加入AA、GSH或Cys，可将MnO2还原为Mn2+，发光强度得到恢复。纳米系统的浓度范围分别为AA 0.500 - 3.375 mM（R2 = 0.99）、GSH 0.6250 - 11.88 mM（R2 = 0.99）和Cys 0.6250 - 9.375 mM（R2 = 0.99）。
An redox luminescence switch was developed for the sensing of glutathione (GSH),l‐cysteine (Cys) orl‐ascorbic acid (AA) based on redox reaction. The Mn2+‐doped NaYF4:Yb,Er upconversion nanorods (UCNRs) with an emission peak located in the red region were synthesized. The luminescence intensity of the UCNRs could be quenched due to the Mn2+could be oxidized to MnO2by KMnO4. Subsequently, when the AA, GSH or Cys was added into the MnO2modified upconversion nanosystem, which could reduced MnO2to Mn2+and the luminescence intensity was recovered. The concentration ranges of the nanosystem are 0.500–3.375 mM (R2= 0.99) for AA, 0.6250–11.88 mM (R2= 0.99) for GSH and 0.6250–9.375 mM (R2= 0.99) for Cys, respectively.